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30 Cards in this Set
- Front
- Back
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What is the term dor the denture bearing zones of the edentulous mouth which do not move during the normal physiologic activities of swallowing?
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Myostatic
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Why build dentures to the extension of the myostatic outline?
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They have an inherent stability not possible when the flanges are extended beyond this stable myostatic zone.
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What are the two physiological surfaces of the oral cavity?
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1) Mobile (myodynamic)
2) Immobile (myostatic) |
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Where is the myostatic area on the maxilla?
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The Entire Palate and the Alveolar Ridge
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How do you identify the mylohyoid ridge on the cast?
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Turn the cast to throw a shadow on the lingual of the alveolar ridge
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Where does the mylohyoid ridge run from?
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It runs from a point anterior to the retromolar pad forward to about the 1st or 2nd premolar
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Draw a semicircular line around the anterior ___ of the retromolar pad.
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1/2
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What is the tissue in the posterior 1/2 of the retromolar pad?
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Fatty tissue covered by mucous membrane
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What is the tissue in the anterior 1/2 of the retromolar pad and what function does it serve?
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Fibrous CT. This provides stability & support for the distal end of the denture.
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What is the ridge on the buccal side of the alveolar ridge?
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External Oblique Ridge
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What is outlined by an upside down V mark?
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2 Buccal and 1 Labial Frenum
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How far away from the crest of the ridge are the frenulum located?
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3-5 mm
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What are the oblong bumps on either side of the labial frenum?
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The mentalis muscle attachments
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The Lower the anterior ridge, the ______ the Mentalis Muscle is to the ridge.
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Closer
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What does the mentalis muscle do to the denture?
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lift the denture
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How much of the mentalis muscle can you safely cover?
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1/3
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What does the curve formed by the line from the retromolar pad to the distal end of the External Oblique Ridge represent?
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Where the Masseter Muscle fibers attach to the mandible buccally to the retromolar pad.
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What does the line from the anterior end of the line on the external oblique ridge to the V on the buccal frenum represent?
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The area where Depressor Anguli Oris attaches low and on the outside of the mandible
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Where does the Depressor Anguli Oris Terminate?
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Terminates in the Modiolus, just behind the corners of the mouth.
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What line represents the peripheral extent of the denture in order to avoid the dislodging forces of the Depressor?
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The line from the EOR to the buccal frenum.
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What is the curved line from the buccal frenum around to the Labial Frenum avoiding?
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The Mentalis Muscle
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What happens if the denture is built over the mentalis muscle?
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It will dislodge the denture and occlusal pressures will cause pressure on the muscle and cause sor spots.
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What is important about drawing your line from the anterior of the Mylohyoid ridge to the posterior of the infra-alveolar groove?
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It cannot be under the edge where the bone turns under.
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What is the line on the lingual surface of the mandible from canine to canine?
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The Infra-Alveolar Groove
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What is attached to the Infra-alveolar Ridge?
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The floor of the mouth
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Only the _______ _____ that attach to the mandible lateral to the crest of the EOR pose any dislodgement or overextension problems for the denture.
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Buccinator Fibers
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What muscle's anterior fibers bulge strongly into the Buccinator muscle lateral to the Retromolar pad?
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Masseter Muscle
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Where is the origin of the Mylohyoid muscle?
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The inferior edge of the Mylohyiod Ridge from the 3rd molar region to the symphysis of the mandible.
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What provides support for the floor of the mouth and is active in most physiologic movements of the mouth?
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The mylohyoid muscle
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T/F
The denture should finish flush with the Mylohyoid Ridge - approximating the shape of the lost alveolus in that area. |
True
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